HB 1592 also enacted an annual report requirement and imposed a $10 annual fee. Clearly, the legislature doesn't like corporations sole much, although I believe the behavior of mine has been exemplary. The House bill report noted:

The bill requires corporations sole to file an annual report with the [Secretary of State] and pay an annual filing fee, which is consistent with the requirements of non-profit corporations. Many illegitimate corporations sole will not be able to file annually because they provide false addresses. Washington is one of 15 states that allow corporations sole registrations. Oregon and Idaho recently prohibited the formation of corporations sole. Washington is on the Internal Revenue Service's radar for fraudulent corporations sole registrations. Disallowing further registrations will prevent new fraud. Between 1861 and 1990 there were a total of 82 corporations sole. As of today there are more than 4,000 corporations sole [in the state of Washington? Nationwide? Worldwide?]. The [Secretary of State] estimates that only a quarter of corporations sole are legitimate.

The annual report, alas, doesn't give me much room to exercise creativity, only asking for name, place of business, and signature of the bishop, overseer or presiding elder. That would be me.